Multiple-effect evaporating apparatus.



l Il -Jeni PATENTED MAY 9, 1905.

S. M. LILLIE. EECT EVAPORATING APPARATUS.

' MULTIPLE EF APPLICATION FILED OOT.10,1904. I

3 SHEETS-SHEET 1.

No. 789,159. y Y PATBNTBD MAY 9, 1905.

s. M. LILLIB. ,y

MULTIPLE EFFECT EVAPORATING APPARATUS. APPLICATION FILED o0T.1o,19o4.

3 SHEETS-SHEET 2.

N5, 789,159.. PATENTED MAY 9, 1905. s. M. LILLIB.

MULTIPLE EFFECT EVAPORATING APPARATUS.

APPLICATION FILED OOT.10,1904.

B'SHBETS-SHEBT 3.

NITED STATES i Patented May 9, 1905.

PATENT' OFFICE.

MULTIPLE-EFFECT EVAPORATING APPARATUS. t

SPECIFICATION forming part of Letters Patent No. 789,159, dated May 9,1905.

Application filed October 10, 1904. Serial No. 227,826.l

thereof.

Heretofore it has been customary in multiple-effect evaporatingapparatus of the Lillie type to locate the pumps for circulating theliquor within the effects upon foundations specially built for them andto connect them with the effects by exposed pipes through which theliquor passes. The objection to this resides in the fact that it iscostly to construct, involves the danger of leaking' joints because ofuneven settling or excessive vibration, permits loss of heat from theliquor, and requires power to overcome the circulation in the lengthypipes required.

The object of my invention is to overcome the objections mentioned aboveand at the same time improve the general design and simplify theapparatus.

In carrying my invention into practice I arrange the several effectsside by side upon suitable supports or foundations and attach theseveral liquor-circulating pumps directly to the bottoms of theirrespective effects, whereby said pumps are supported, through thestructure of the effects, upon their foundations. I prefer to operatesaid pumps by a shaft common to all of them. These pumps have theirsuction or intake passages opening directly into the interior of theeffects and discharge upward through the chamber of the effect to thedistributing device, whereby the shortest possible circuit ofcirculation of' the liquor is obtained and chilling by circulation ofoutside piping is avoided.

My invention also comprehends details of construction of the pump,which, together with the features above specified, will be betterunderstood by reference to the drawings, in Which June 28, 1904.

Figure 1 is an elevation of a multiple effect embodying my invention.Fig. 2 is a plan View of same. Fig. 3 is a sectional elevation throughone of the effects and its circulatingpump. Fig. 4 is an enlargedsectional elevation of the pump shown in Fig. 8. Fig. 5 is a sectionalview of the pump, taken on line 5 5 of Fig. 4; and Fig. 6 is a plan Viewof the pump removed.

A, Af, A2, and A3 are four effects of the horizontal type and supportedside by side by suitable girders Z, carried upon columns or othersuitable supports or foundations. This type of multiple e'ect is knownas the Lillie multiple effect and is more fully described in myapplication, Serial No. 214,500, filed I, however, do not confine mypresent invention to any particular type of multiple effect. In the typeof effect shown the steam or heating chambers S are arranged at oppositeends in adjacent effects. L is the liquor-evaporating chamber andcontains the evaporating-tubes H. The liquor to be vaporated is pumpedfrom the bottom of the chamber L by circulating-pump I, secured directlyto the body of the effect, and forced upward through pipe H and sprayedfrom the perforated distributingpan Hf, which distributes it upon theevaporating-tubes. The pumps I of the effects A and A;s are connected bya pipe I', having valves c' z', and this pipe between the valves isconnected with the discharge pump J, which is employed to discharge thecondensed liquor by pipe J. The liquor is supplied to the severaleffects in series beginning with either effect A or A3 by pipes N and M,respectively. When the effect A is to receive the thin liquor, it issupplied by pipe M, through va valve m and by a regulating fioat-valveN, into the bottom of the evaporating-chamber L. From this efl'ect theliquor passes by a pipe M, through a valve m and by a similarfloat-valve N, into the bottom of the effect Af. The passage of theliquor in a gradually more concentrated condition passes in a similarmanner from effect A to effect A2 and from it to effect A, whence it isdischarged through the pump I, pipe I', valve ci, and discharge-pump J.During the time the liquor is flowing, as thus described, the steam issupplied by valved pipe E to the IOO steam -chamber S of effect A, andthe water of condensation is conveyed away by pipe K through asteam-trap r. Thevvapors from the evaporating chamber of effect A passthrough passage B into the steam-chamber S of effect A. The vapors fromthe evaporating-chamber L of this effect A pass by passage Bl into thesteam-chamber S of effect A2. The vapors from effect A2 pass by passageB2 into the steam-chamber of effect A3, and the vapors of theevaporating-chamber L of this last efect are condensed in any usual way.The various passages are controlled by valves, such as shown at C2, forexample, and which are open to allow the vapors to pass freely throughthe passages above referred to. When the system is to be reversed, theliquor is circulated in a similar manner to that described, but in thereverse direction, being fed into effect A3 by pipe M and then passedsuccessively through the several effects under the control of thefloat-Valves until it is finally discharged through the discharge-pumpJ, which draws from the pumpl I of' the effect A. The several valves Mare adjusted to insure the proper direction of circulation of theliquor. As shown, the pipe M communicates directly with effects A and A2and indirectly through the float-valves N with effects A and A3. Thevalves m m permit the flow of liquor from pipe M through float-valves N,but not beyond said valves. The same is true of the pipes M' and valvesm. The fiow of the liquor having been reversed through the severaleects, the valves in the passages B to B5 are reversed also, and thenthe vapors pass as follows: Steam is shut off by valve E and admitted tothe steam-chamber S of effect A3 by steam-valve E, where it iscondensed, and the water of condensation escapes by the steamtrap, asbefore. The vapors generated in the evaporating chamber of this effectpass through passage B3 into the steam-chamber of effect A2 and arecondensed. The vapors of the evaporating-chamber of effect A2 pass bypassage Bf into the steam-chamber of effect A and are condensed. Thevapors from this effect pass by passage B into the steam-chamber ofeffect A and are condensed, and the vapors of evaporating-chamber ofeffect A are condensed byasuitable condenser (not shown) in any suitableor well-known manner.

While I have described in detail my preferred and reversible type ofmultiple effect adapted to be used in connection with my improved pump,it will be understood that the multiple effect need not be reversiblenor restricted to any type. Moreover, my improved circulating-pump isadapted for use in a single effect, if` so desired, or with any tank forany other purpose.

Referring new more specifically to the construction of thecirculating-pumps I, (shown in Figs. 4f, 5, and 6,) they consist of thefollowing' characteristic features: rIhe case is flattened andpreferably somewhat spiral, paddle-wheel I2, the blades of which areshaped to catch and drive the liquor. This wheel I2 is secured to arotating shaft P, having bearings in the glands I7 of the stuffing-boxesIG. The upper part I3 of the case is detachable to enable the wheel tobe inserted and also contains the discharge-outlet, to which is boltedthe inside circulatingpipe H2. The central portion of the paddle-wheelcase is open on each side and communicates with the intake-passages I5,extending laterally and upward, as shown. Il is a discharge at thebottom of the pump to connect with the discharge-pipe I. The pump hasaflange I8 near its upper part, which is bolted to acasting O, riveted tothe bottom of the cylinder of the effect and forming an opening therein,which is closed by the pump and through which the liquor finds its wayinto the intake-passages I5. To prevent vortices at the intake-passages,the opening in the casting O is surrounded with an upright wall R,surmounted with a plate R, held a short distance above it, so as to formpassages 7', through which the liquor passes, as indicated by arrows.The fiow of the liquor is also deflected by the plate R and in passingaround its edges is caused to take a circuitous course, and consequentlycannot produce vortices. The upright -wallR serves as a dam to hold backfrom the pump particles of scale which may fall from the tubes andsettle in the bottom of the effect.

The pipes S' supply water to the stufngboxes I6 to make a water sealagainst the infiow of air, and the pipes S2 supply oil to the glands tolubricate the bearings therein in which the shaft P rotates.

By carefully alining the several effects it is evident that the shaftI), connecting the several pumps, will run true and may be driven by abelt-wheel P or in any other convenient way. discharge-pipe H2 whollywithin the effect it is made much shorter than if arranged on theoutside of the apparatus, and in case of leaking joints no loss results,because the pipes are wholly within the effect.

In general appearance the apparatus is greatly improved overconstructions heretofore in common use. It is simpler, cheaper, moredurable, and more easily kept in repair than those types where the pumpsare supported upon independent foundations.

While I prefer the construction set out as excellently adapted for theemployment of my invention in practice, I do not limit myself to thedetails, as they may be modified without departing from'the spirit ofthe invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination of' two or more effects,

`of a multiple-effect evaporating apparatus, with a circulating-pumpsecured directly to It will also be seen that by keeping ther IOO IIO

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and carried by each of the eli'ects, and ashaft common to all of thepumps for operating them.

2. In an evaporating apparatus the body of the evaporator, combined witha circulatingpump wholly supported by the body and secured upon thelower and outside surface thereof so as to be detachable from theoutside and having intake-passages opening directly from the interior ofthe body.

3. In an evaporating apparatus, the body of the evaporator, combinedwith a circulatingpump wholly supported by the body and removablysecured upon the lower and outside surface thereof so as to bedetachable from the outside and having intake-passages opening directlyfrom the interior of the body, whereby the pump as a whole may bereadily removed from the outside of the body without disturbing theinterior structure.

4. In an evaporating apparatus, the body of the evaporator having anopening through its bottom, combined with a circulating-pump fitted oversaid opening and having a flange secured to the outside surface of thebody around the opening so that the pump is directly supported by thebody and detachable from the outside and in which the pump is furtherprovided with intake-passages opening directly into the interior of thebody through the said opening in its bottom.

5. In an evaporating apparatus, the body of the evaporator, combinedwith a circulatingpump having its weight wholly supported by the bodyand being removably secured directly to the body upon its outside andlower part and having intake-passages opening from the interior of thebody, and means wholly within the body for causing the liquor to take acircuitous course in passing from the body to the intake-passages.

6. In an evaporating apparatus, the combination of the body of theevaporator, with a circulating-pump secured to the lower part of thebody having intake-passages opening directly from the body to the pump,and means within the body for causing the liquor to take a circuitouscourse in passing from the body tothe intake-passages, consisting of aplate R placed above the said intake-passages.

47'. In an evaporating apparatus, the combination of the body of theevaporator, with a circulating-pump secured to the lower part of thebody having intake-passages opening directl y from the body to the pump,means within the body for causing the liquor to take a circuitous coursein passing from the body to the intake-passages consisting of a plate Rplaced above the said intake-passages, and an upright wall R surroundingthe intake-passages and supporting the plate R with liquor-passagesbetween them.

8. A liquor-tank, in combination with a circulating-pump mechanicallyconnected with .the outside of the bottom of the tank whereby its weightis wholly supported by the tank and it is also removable from theoutside of the tank and in which the said pump is provided with intakeand discharge passages opening into the tank, a rotatable paddle-wheel,a shaft for rotating the paddle-wheel journaled in the pumpcasing andwholly outside of the tank, and stuffing-boxes for the shaft alsoarranged outside of the tank.

9. A liquor-tank, in combination with a circulating-pump mechanicallyconnected with the outside of the bottom of the tank whereby its weightis wholly supported by the tank and it is also removable from theoutside of the tank and in which the said pump is provided with intakeand discharge passages opening into the tank, a rotatable paddle-wheel,a shaft for rotating the paddle-wheel journaled in the pump-casing andwholly outside of the tank, and stuffing-boxes for the shaft alsoarranged outside of the tank, and means located within the tank forcausing the liquor to take a circuitous course in passing from the tankinto the intake-passages of the pump.

10. The combination of a liquor-tank, with a pump consisting of aIcasing made in separable upper and lower parts the latter being secureddirectly to the outside of the bottom of the tank so as to have itsweight wholly supported by said tank and be movable from the outsidethereof, the said pump having intake-passages in the lower part of itscasing and a discharge-passage into the tank from the upper portion ofthe said casing, a rotatable paddle-wheel within the casing, and a shaftfor rotating the paddle-wheel journaled in the lower part of the casingand wholly below and outside of the tank.

1l. The combination of a liquor-tank having an opening in the bottom,with a circulating-pump casing secured to the outside of the ICO tankand covering the opening therein and having a central paddle-wheelcompartment and two intake-passages respectively extending downward oneach side of the paddle-wheel compartment and opening centrallytherewith, the rotatable paddle-wheel, and a shaft outside of thetank torotate it journaled in the casing.

12. In an evaporating apparatus, the combination of the body of anevaporator, with a circulating-pump mechanically attached to the outsideof the lower part of the body whereby it is removable from the outsideof the body and its weight is wholly carried by the body, said pumphaving a discharge-opening from the top directly into the interior ofthe body an intake-passage from the interior of the body, and adischarge-port from the pump exterior to the body for removing theliquor from the body.

13. In an evaporating apparatus, the combination of the body of anevaporator, with a circulating-pump'mechanical ly attached to theoutside of the lower part of the body whereby it is removable from theoutside of the body IlO IIS

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and its Weight is Wholly carried by the body, R surrounding the intakepassages to hold said pump having an intake-passage from the back scaleand matters settling on bottom of interior of the body, and adischarge-port the body.

from the pump exterior to the body `for re- In testimony of whichinvention I hereunto 5 moving the liquor from the body. set my hand.

14. In an evaporating apparatus, the eom- SAMUEL MORRIS LILLIE binationof the body of an evaporator, with a circulating-pump secured to thelower part of Witnesses:

the body having intake-passages opening di- R. M. KELLY, IO reetly fromthe body to the pump, and a Wall M. J. EYRE.

